# Copyright (2023) Beijing Volcano Engine Technology Ltd.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#     http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import time


class TimePerf:
    def __init__(self):
        self.time_dict = dict()  # record the start/end of every tag
        self.cost = dict()  # record the start - end of every tag

    def clear(self):
        self.time_dict = dict()

    def time_start(self, tag):
        self.time_dict[tag + "_start"] = time.time()

    def time_end(self, tag):
        self.time_dict[tag + "_end"] = time.time()
        self.cost[tag] = self.time_dict[tag + "_end"] - self.time_dict[
            tag + "_start"]

    def time_cost(self, tag):
        return self.time_dict[tag]

    def get_cost(self):
        return self.cost


class EmptyTimePerf:
    def __init__(self):
        pass

    def clear(self):
        pass

    def time_start(self, tag):
        pass

    def time_end(self, tag):
        pass

    def time_cost(self, tag):
        return 0

    def get_cost(self):
        return {}
